rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=7b94/1/0x4000000000000000 softirq=26823/26823 fqs=0
	(detected by 0, t=10502 jiffies, g=36249, q=77 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11353 Comm: kworker/u4:74 Not tainted 6.1.0-rc4-syzkaller-00020-gf67dd6ce0723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0xc/0x12
Code: 56 57 41 50 41 51 41 52 41 53 e8 df 14 00 00 41 5b 41 5a 41 59 41 58 5f 5e 5a 59 c3 66 90 52 b8 01 00 00 00 31 d2 f0 0f b0 17 <3c> 01 75 02 5a c3 56 0f b6 f0 e8 c5 ff ff ff 5e 5a c3 66 90 41 57
RSP: 0018:ffffc900003e8d78 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff888078dda340 RCX: ffffffff815f5470
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888078dda2e8
RBP: ffff888078dda2e8 R08: 0000000000000000 R09: ffff888078dda2eb
R10: ffffed100f1bb45d R11: 0000000000000000 R12: ffff888078dda2f0
R13: ffff888078dda2f8 R14: ffff8880270cd520 R15: 17e25b902fc4b720
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb27000 CR3: 00000000321dd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:596 [inline]
 queued_spin_unlock arch/x86/include/asm/qspinlock.h:57 [inline]
 do_raw_spin_unlock+0x171/0x230 kernel/locking/spinlock_debug.c:141
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1a/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:390 [inline]
 advance_sched+0x435/0x9a0 net/sched/sch_taprio.c:749
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x690/0xfb0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0x17c/0x640 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x223/0x630 kernel/locking/lockdep.c:5636
Code: 87 a3 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000601fa28 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000c03f48 RCX: e59b167ddaae7ae7
RDX: 1ffff110065a4d99 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff9092a947
R10: fffffbfff2125528 R11: 1ffffffff17f2059 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bf85cc0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:304 [inline]
 rcu_read_lock include/linux/rcupdate.h:738 [inline]
 inet_twsk_purge+0x12e/0x8a0 net/ipv4/inet_timewait_sock.c:268
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:601
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g36249 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=15579
rcu: rcu_preempt kthread starved for 10502 jiffies! g36249 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:28168 pid:15    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0xae9/0x53f0 kernel/sched/core.c:6503
 schedule+0xda/0x1b0 kernel/sched/core.c:6579
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1660
 rcu_gp_kthread+0x236/0x360 kernel/rcu/tree.c:1859
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11353 Comm: kworker/u4:74 Not tainted 6.1.0-rc4-syzkaller-00020-gf67dd6ce0723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:mark_lock.part.0+0x4/0x1910 kernel/locking/lockdep.c:4593
Code: 84 00 00 00 00 00 be 00 00 04 00 48 c7 c7 20 26 7e 8f e8 cf 23 a3 02 89 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 <41> 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 49 89 f4 55 53
RSP: 0018:ffffc900003e8a70 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000040 RCX: ffffffff815e8c30
RDX: 0000000000000000 RSI: ffff888032d26d98 RDI: ffff888032d26280
RBP: ffff888032d26dba R08: 0000000000000000 R09: ffffffff9092a94f
R10: fffffbfff2125529 R11: 0000000000000000 R12: ffff888032d26d98
R13: ffff888032d26280 R14: ffff888032d26cd0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb27000 CR3: 00000000321dd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 mark_lock kernel/locking/lockdep.c:4598 [inline]
 mark_usage kernel/locking/lockdep.c:4526 [inline]
 __lock_acquire+0x14a2/0x56d0 kernel/locking/lockdep.c:5009
 lock_acquire kernel/locking/lockdep.c:5668 [inline]
 lock_acquire+0x1df/0x630 kernel/locking/lockdep.c:5633
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
 debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:658
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer+0x2b/0x470 kernel/time/hrtimer.c:1084
 __run_hrtimer kernel/time/hrtimer.c:1702 [inline]
 __hrtimer_run_queues+0xc12/0xfb0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
 __sysvec_apic_timer_interrupt+0x17c/0x640 arch/x86/kernel/apic/apic.c:1113
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x223/0x630 kernel/locking/lockdep.c:5636
Code: 87 a3 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000601fa28 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000c03f48 RCX: e59b167ddaae7ae7
RDX: 1ffff110065a4d99 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff9092a947
R10: fffffbfff2125528 R11: 1ffffffff17f2059 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bf85cc0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:304 [inline]
 rcu_read_lock include/linux/rcupdate.h:738 [inline]
 inet_twsk_purge+0x12e/0x8a0 net/ipv4/inet_timewait_sock.c:268
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:601
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>